“I originally saw the mechanism for this project on Youtube. I wanted to create this in a fully 3d printable form because it’s an interesting interactive mechanism. I also thought it would make for a fun kinetic sculpture!
This video shows the engineering process behind RobBob the robot.
In the animation, 1 motor controls the rotation of the head through the yellow shaft and bevel gear. The tilt of the head can be controlled by rotating both motors together.”